V1493 Aql = Nova Aquilae 1999

V1493 Aql = Nova Aquillae 1999

Position: 19 07 36.90   +12 31 26.2     Akimasa Nakamura
          19 07 36.92   +12 31 26.5     Nick James (11 GSC V1.2 stars)
          19 07 36.89   +12 31 26.5     Gianluca Masi (6 USNO A2.0 stars)

IAUC 7223 announced the discovery of a nova in Aquila by Akihiko Tago (Tsuyama, Japan) on two films obtained on July 13.558 and 13.560 UT. The photographs were taken using a 55mm, f/3 lens and T-max 400 film (unfiltered) and the discovery magnitude was 8.8. Tago notes that no star is visible at the position on the films taken on July 5 (limiting mag. is 11) and July 9 (10.5).

K. Ayani and T. Kawabata at Bisei Astronomical Observatory (BAO), Okayama, Japan, obtained a low resolution spectrum (470-680nm) of the nova on July 14.6 UT with BAO 1.01-m telescope. Strong, broad H-alpha and H-beta lines are visible. The H-alpha line has a FWHM of about 3400 km/s and a equivalent width of about 50 nm.

Patrick Schmeer reported on VSNET that there is no prenova candidate visible on the POSS to a limiting magnitude of 20.

Latest lightcurve

Images

1999 July 14.913. Mark Armstrong.
1999 July 14.931. Nick James.
1999 July 14.973. Denis Buczynski.
1999 July 15.970. Mark Armstrong.
1999 July 18.031. Mark Armstrong.
1999 July 20.909. Nick James.
1999 July 21.005. Mark Armstrong.
1999 July 22.935. Denis Buczynski.
1999 July 23.992. Mark Armstrong.
1999 July 27.012. Mark Armstrong.
1999 August 1.89. Mark Armstrong.
1999 August 3.91. Mark Armstrong.
1999 August 14.86. Mark Armstrong.
1999 August 14.86. Mark Armstrong.
1999 August 16.91. Mark Armstrong.
1999 August 21.94. Mark Armstrong.
1999 August 25.86. Mark Armstrong.
1999 August 31.90. Mark Armstrong.

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